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通过均相原子转移自由基聚合法(ATRP)将生物质基疏水性松香单体(脱氢枞酸(2-甲基丙烯酰氧基乙基)酯,MAEDA)接枝到纤维素骨架上合成了全生物质基两亲性的纤维素-g-聚脱氢枞酸接枝共聚物(cellulose-g-PMAEDA).ATRP反应过程动力学研究表明cellulose-g-PMAEDA接枝共聚物的合成过程是活性可控的;傅里叶红外光谱(FTIR)、核磁共振氢谱(1H-NMR)、凝胶色谱(GPC)和X射线衍射(XRD)结果证实了cellulose-g-PMAEDA接枝共聚物的成功合成;由于聚脱氢枞酸侧链的引入,cellulose-g-PMAEDA接枝共聚物的热稳定性,疏水性能明显提高,并且具有紫外吸收性能;动态光散射仪和透射电镜结果表明两亲性cellulose-g-PMAEDA接枝共聚物能够在水溶液中自组装成平均粒径约为200 nm左右的纳米微球,并且该纳米微球具有以纤维素为壳,聚脱氢枞酸酯为核的核壳结构.
The biomass-based hydrophobic rosin monomer (dehydroabietic acid (2-methacryloyloxyethyl) ester, MAEDA) was grafted onto the cellulose backbone by means of homogeneous atom transfer radical polymerization (ATRP) (Cellulose-g-PMAEDA), an amphiphilic amphiphilic cellulose-g-PMAEDA graft copolymer, and the kinetics of the ATRP reaction showed that the cellulose-g-PMAEDA graft copolymer And the activity was controllable. The results of FTIR, 1H-NMR, GPC and XRD confirmed that cellulose-g-PMAEDA graft copolymer Due to the introduction of poly dehydroabietic acid side chain, cellulose-g-PMAEDA grafted copolymer thermal stability, hydrophobic properties increased significantly, and has UV absorption properties; dynamic light scattering instrument and transmission electron microscopy results show that two The hydrophilic cellulose-g-PMAEDA graft copolymer can be self-assembled into nanospheres with an average particle diameter of about 200 nm in aqueous solution, and the nanospheres have a shell of cellulose and polydehydroabietic acid ester of Nuclear nuclear shell structure.